Bhagavad Gita Chapter 10, Text 38

Bg 10.38

dando damayatam asmi
nitir asmi jigisatam
maunam caivasmi guhyanam
jnanam jnanavatam aham

Word for word: 
dandah — punishment; damayatam — of all means of suppression; asmi — I am; nitih — morality; asmi — I am; jigisatam — of those who seek victory; maunam — silence; ca — and; eva — also; asmi — I am; guhyanam — of secrets; jnanam — knowledge; jnana-vatam — of the wise; aham — I am.

Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Among all means of suppressing lawlessness I am punishment, and of those who seek victory I am morality. Of secret things I am silence, and of the wise I am the wisdom.

Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
There are many suppressing agents, of which the most important are those that cut down miscreants. When miscreants are punished, the agency of chastisement represents Krishna. Among those who are trying to be victorious in some field of activity, the most victorious element is morality. Among the confidential activities of hearing, thinking and meditating, silence is most important because by silence one can make progress very quickly. The wise man is he who can discriminate between matter and spirit, between God’s superior and inferior natures. Such knowledge is Krishna Himself.